1: A person who uses to much of one condiment on a wide variety of food.
2: Someone who condemns you about what kind of condiment or seasoning you put on your food.
3: A person who is fatherless and of mixed race that does not know the ethnicity of their father.

Example 1- Person A: I love ranch dressing, I put it on all my foods. Person B: You flavor bastard

Example 2- Person A: Why are you putting so much pepper on your popcorn? Person B: Why are you being such a flavor bastard?
Example 3- Person A: Are you BlackChinese or Black Japanese? Person B: Don't know, I'm a flavor bastard.